Air-compressing machine



M. BARBETTA.

AIR COMPRESSING MACHINE. APPLICATION FILED FEB. 17,1917. RENEWED APR. 29. 1921.

1,882,453. E Patented June 21,1921.

4 sHsns-suur 1.

M. BARBETTA.

AI'R COMPRESSING MACHINE. APPLiCATlON HLED FEB. 17,1911. RENEWED APR-29,1921.

Patented June 21, 1921.

4 SHEETS-SHEET 2-.

' MBJLFZ 82 5a aw Q m 8 R ll iii H mm mm m\ m m r Mm .w K N. EW m \w g m. MM mu Q q wm w FWH m 6 h I Elm? 52. u 55:52: g .Q

M. BARBET TA.

AIR COMPRESSING MACHINE.

APPLICATION FILED FEB- 17,1917- RENEWED APR. 29.1921.

1,382,453, I PatentedJune 21,1921.

4 SHEETSSHEET 3.

M. BARBETTA.

v AlR COMPRESSING MACHINE. 1 APPLICATION HLED FEB. 17,1917- RENEWED APR. 29.1921.

1,382,453. v Patented June 21, 1921..

4 SHEETS-SHEET 4-.

PATENT OFFICE.

MICHELE BARBETTA, OF PATERSON, NEW JERSEY.

AIR-ooMPREssING MACHINE.

Application filed February 17, 1917, Serial No. 149,237. Renewed April 29, 1921.

To all whom 2'2. may concem Be it known that I, llIICHELE BARBE'rrA, a subject of the King of Italy, residin at Paterson, in the county of Passaic, New ersey, have invented certain new and useful Improvements in Air- Compressin Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an air compressing machine which is designed to provide an unbroken stream of compressed air, and an object of this invention is to provide a novel structure for operating the air compressors which construction includes pivoted levers having arcuate cams or arms detachably connected to their lower ends the concaved surfaces of which arms are engaged by rollers carried by crank portions of a crank shaft, so that during the rotation of the crank shaft, the levers will be moved pivotally for operating the reciprocatory pistons of the air compressors.

Another object of this invention is to provide means for returning said pivoted levers to their normal positions where they Will be engaged by the crank shaft carried rollers upon the next revolution of the shaft,

after the rollers have moved out of engage ment with the concaved surface of the removable or detachable arcuate ends of the levers.

A further object of this invention is to provide, in an air compressing machine as specified, a plurality of gears which are connected to provide an increased leverage and to decrease the speed of operation of the air compressors with respect to the operation of the prime mover of the compressors.

With the foregoing and other objects in view, this invention consists in such novel features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings and claimed.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters designate like and corresponding parts throughout the several views, and in which:

Figure 1 is a side elevation of the improved air compressing machine;

Fig. 2 is a top plan View of the machine;

Specification of Letters Patent.

Patented June 21, 1921.

Serial No. 465,504.

Fig. 3 is a vertical section through the machine;

Fig. 4 is a detail operated lever Fig. 5 is a detail perspective of the cam perspective of the crank shaft and two of the rollers carried thereby;

shafts employed in the construction of the compressor, as will be hereinafter more fully described. The air compressors are operated through a shaft 11, which extends transversely across the supporting frame 1 substantially intermediate of its ends and issupported by bearings 12 which are formed upon the supporting structure. 11 has a pinion 12' mounted thereon which meshes with a gear 13. The gear 13 iscarried by a crank shaft 14. The crank shaft 14 is rotatably supported by suitable bearings 15 which are also carried by the supporting structure 1.

-The tank 34 has a pipe 38 attached to the uppermost portion thereof, upon the upper end of which pipe a gage 39 is mounted.

The crank shaft 14 rotates a shaft 45 through the meshing engagement between the gear 13 and a pinion 46 which is mounted upon the shaft 45. A gear 47 is mounted upon the shaft 45 and it meshes with a pinion 48 carried by a shaft 49 for rotating the shaft 49 by the rotation of the shaft 45. By providing the gears and pinions as illus trated in the drawings, the speed of rotation of the shaft 49 will be greatly increased over the speed of rotation of the crank shaft 14. The shaft 49 has power transmitting pulleys or balancing fly-wheels 50 mounted thereon.

The cranks 51 of the crank shaft 14 have rollers 52 rotatably mounted upon the wrists thereof, which rollers engage and ride over the arcuate feet or arms 53 of substantially vertical levers 54. The levers 54 are piv- The shaft otally mounted, intermediate their ends as shown at 55, and they have their upper ends forked as shown at 56. Wrist pins 57 are carried by the upper forked ends 56 of the pivoted levers 54 and couplings 58 are connected to the wrist pins 57. The wrist pins 57 are connected through the medium of the couplings 58 to pitmen 59. The pitmen 59 are connected to the wrist pins 60 of crossheads 61. The cross-heads 61 travel between the usual type of guides 62 and they have the piston rods 63 of the air compressors 64 connected thereto, thus the pivotal movement of the levers 54 will operate the air compressors 64. The air compressed by the compressors 64 passes outwardly through pipes. 65 into the tank 34. The pipes 65 have check valves 66 interposed therein to prevent back pressure of compressed air from the tank 34. The air compressors 64 are of the usual reciprocatory piston type.

The pitmen 59 have hooks 66' connected to their ends remote from the cross-heads 61, to which hooks contractile coiled springs 67 are connected. The springs 67 are also connected to hooks 68 the shanks 69 of which are screw threaded and extend through a bar 70. Nuts 71 are mounted upon the screw threaded shanks 69 for regulating the tension of the contractile springs 67. The springs 67 are provided for returning the levers 54 to their normal positions after they have been operated by engagement of the rollers 52.

The cranks 51 of the crank shaft 14 are spaced, successively, ninety degrees apart so that the levers 54 will be operated at different times, causing only one of the air compressors 64 to be under a compression stroke at a time, thereby causing a continuous stream of compressed air from the compressors.

The various surfaces of the improved air compressor, where friction would be gen erated during the operation of the same are lubricated, in any suitable manner, such as by the usual type of lubricating cups 70.

In Fig. 6 of the drawings, a modified construction is illustrated for operating the air compressors 100, which correspond to the air compressors 64 of'the preferred form heretofore described. The modified form illustrated in Fig. 6 includes substantially vertical pivoted levers 101, which are pivoted intermediate their ends as shown at 102 and have arcuate feet or arms 103 carried by their lower ends which are engaged by rollers 104. The rollers 104 are carried by the crank portions 105, of the crank shaft 106 which corresponds to the crank shaft 14. The levers 101 have arms 107 attached to their upper ends and extending outwardly at right angles thereto- Rollers 108 are car- 1 ried by the outer ends of the arms 107 and they engage the lower concavo-convex surface of the end 109 of the pivoted arm 110. The arm 110 is pivoted upon suitable trunnions 111 and it has its end remote from the end 109 connected to a cross-head 112. The cross-head 112 moves vertically between vertical guides 113 of the usual type employed in cross-head constructions. The cross-hea 112 is connected to the piston rod 114 of the air compressor 100 and it has a hook 115 attached thereto and extending oppositely from the piston rod 114. The hook 115 has a contractile coiled spring 116 detachably connected thereto which spring is also connected to an adjustably mounted hook 117, which is adjustable for regulating the tension of the spring 116.

The pivotal movement of the levers 101, through the rolling engagement of the rollers 104 with the inner concaved surfaces of the arms 103, will rock the arm 110 upon its pivot 111 and consequently reciprocate the cross-head 112 and the piston rod 114 of the air compressor 100.

Still another modified form of the construction employed for operating the air compressors is illustrated in Fig. 7. This construction includes the air compressors 120which are disposed vertically, and 0ppositely to the posltion of the air compressors 100. The piston rod 121 of the air compressor 120 is connected to a cross-head 122 carried by the usual type of guides 123. The cross-head 122 has one end of a pivoted lever 124 connected thereto. The lever 124 is pivotally mounted intermediate its ends as shown at 125 and it has an arcuate portion 126 formed upon one end, oppositely from the pivot 125 to the cross-head 122. The concaved surface 127 of the arcuate end 126 is adapted to be engaged by rollers 128 which are carried by the crank portions 129 of a crank shaft 130. The crank shaft 130 corresponds to the crank shafts 106 and 14 so that the rolling engagement between the rollers 128 and the concaved surface 127 will rock the arm 124 upon its pivot and reciprocate the cross-head 122 of the piston rod 121. The usual type of contractile spring 129, which is connected to hooks 130 and 131 is provided for returning the crosshead 122 and the lever 124 to their normal positions.

A further modified form of the mechanismemployed for operating the air compressors, which form combines parts of both the forms illustrated in Figs. 6 and 7, as shown in Fig. 8. The modified construction illustrated in Fig. 8 includes the air compressors 140 the piston rods 141 of which 1 are adapted to be engaged b rollers 146 which are carried by arms 14 The arms 147 are provided with concaved cut-out portions 148 to accommodate the terminals of the arcuate ends 144. The arms 147 are attached to and extend at right angles from the upper ends of pivotally mounted levers 149. The levers 149 are pivotally mounted intermediate their ends as shown at 150, and they have arcuate arms 151 connected to their lower ends, which arms are identical in construction to the arms 103 and 53. The concaved surface 152 of the arms 151 is engaged and operated by rollers carried by a crank shaft corresponding to the crank shaft pre viously described. A hook 153 is connected to each of the arms 147 and these hooks have contractile coiled springs 154 connected thereto which springs are also connected to hooks 155. The hooks 155 are adjustably mounted for tensioning the springs 154. The springs 154 are provided for returning the pivoted levers 149 and the arms 147 to their normal positions after the rollers have moved out of engagement with the concaved surface 152. A contractile coiled spring 156 is connected to the cross-head 142 and to an adjustably mounted hook 157 for returning the cross-head and the piston rod 141 to their normal positions, after they have been pushed upwardly by the operation of the lever 143.

The various modified forms heretofore described, and illustrated in Figs. 6, 7 and 8 of the drawings are provided for operating the air compressors, when these members are positioned at various places with respect to the'operating crank shaft of the motor.

From the foregoing description taken in connection with the accompanying drawings the advantages of construction and of the method of operation of the improved air compressing machine will be readily apparent to those skilled in the art to which this invention appertains and, while in the foregoing description, the principle of the operation of this invention has been described together with variousfeatures of construction, it is to be understood that certain minor features of construction, combination and arrangement of parts may be altered to suit practical conditions provided such alterations are comprehended within the scope of. what is claimed.

What is claimed is 1. In an air compressing machine, the combination of an air storage tank, a plurality of air compressors communicating with said tank, a crank shaft provided with a plurality of cranks, a plurality of levers pivotally mounted intermediate their ends, each lever provided at one end with an arcuate member positioned for engagement by a crank of .the crank shaft, connections between said compressors and the levers for operating the former when the latter are rocked, and means for returning the levers to normal position when the cranks of said crank shaft are disengaged from the arcuate members of the levers. 1 i

2. In an air compressing machine, the combination of an air storage tank, a plurality of air compressors communicating with said tank, a plurality of operating levers rockably mounted intermediate their ends and provided at their lower ends with arcuate cam members, operating connections between the upper ends of said levers and the respective compressors, a crank shaft provided with a plurality of operating cranks positioned to engage successively the arcuate cam members of the levers so as to cause rocking thereof, and means for returning the levers to normal position when the cranks of the crank shaft are disengaged from the cam members of said levers.

3. In an air compressing machine, the combination of an air storage tank, four air compressors communicating with said tank, four operating levers rockably mounted intermediate their ends, operating connections between the upper ends of said levers and the respective air compressors, arcuate cam members secured upon the lower ends of the levers, a crank shaft provided with four cranks positioned to engage said cam members when the shaft is rotated, said cranks being spaced ninety degrees apart so as to operate the levers in succession and insure that one of the air compressors will at all times be under compression stroke, and means for returning the levers to normal position.

4. In an air compressing machine, the combination of an air storage tank, four air compressors communicating with said tank, four operating levers rockably mounted intermediate their ends, operating connections between the upper ends of said levers and the respective air compressors, arcuate cam members secured upon the lower ends of the levers, a crank shaft provided with four cranks positioned to engage said cam members whenthe shaft is rotated, said cranks being spaced ninety degrees apart so as to operate the levers in succession and insure that one of the air compressors will at all times be under compression stroke, and means for returning the levers to normal position, said means being adjustable to insure proper return of the levers and proper timing thereof.

In testimony whereof I aflix my signature in presence of two witnesses.

. MICHELE BARBETTA. Witnesses:

RoB'r. MEYER, BENNETT S. JONES. 

